Damping apparatus



(No Model.)-

' T. SHAW.

DAMP ING APPARATUS.

PatentedOot. 14,1890.

UNITED STATES ATENT OFFICE.

WILLIAM THOS. SHAW, OF LONDON, ENGLAND.

DAM PING APPARATUS.

SPECIFICATION formingpart of Letters Patent No. 438,193, dated October14, 1890.

Application filed September 8 1890. Serial No. 364,388. (No model.)

To all whom it may concern.-

Be it known that 1, WILLIAM THOMAS SHAW, manufacturer, a subject of theQueen of Great Britain, residing at 110 Bunhill Row, in the city ofLondon, England, have invented certain new and useful Damping Apparatus,of which the following is a specification.

In the specification of a former patent granted to me, dated the 17thday of September, 1889, No. 411,356, I described an inkstand in whichthe ink in the dipping-well always remained at the same level, beingsupplied from a reservoir in which there was pivoted a semi-solid ofrevolution of half the specific gravity of the ink.

The apparatus which forms the subject of the present invention worksupon the same principle. There is a reservoir in which is pivoted aboutits axis a semi-solid of revolution of half the specific gravity of thewater or other liquid in the reservoir. The reservoir communicates witha small well, above which is mounted a box or tray containing a spongeor pad, the pad being connected by a wick to the liquid in the well. Inthis way the pad is always maintained at the same degree of dampness,since the height of the liquid in the well remains constant. A lid isprovided to the box to prevent undue evaporation froin the pad.

The drawing shows a vertical section of an apparatus constructedaccording to this invention.

ais the reservoir; b, the float, which is the half of any solid ofrevolution-suoh, for example, as a sphere or a cylinder. The float b isprovided with trunnions 0, about which it can turn.

d is an air-inlet, and e is a well connected to the reservoir by theduct f.

g g show the height at which the liquid is always maintained by thefloat.

his a box or tray at the top of the Well. In it is a pad i of felt,sponge, or other material. This pad is provided with a wick j, whichdips into the liquid in the well.

I: is the lid of the box.

What I claim is- '1. The-combination of a liquid-containing vessel, afloat of halt the specific gravity of the liquid and of the shapeobtained byhalving a solid of revolution by a plane passing through itsaxis, such float being pivoted in the vessel and free to turn about thesaid axis, and an absorbent-pad in connection with the liquid in thevessel.

2. The combination of a liquid-containing vessel, a float of half thespecific gravity of the liquid and of the shape obtained by halving asolid of revolution by a plane passing through its axis, a wellcommunicating with the vessel, a'tray or box above the well, anabsorbent pad in the tray or box, and awick from the pad to the liquidin the well.

WM. THOS. SHAW.

Witnesses:

THOMAS LAKE, T. F. BARNES, Both of N0. 17 Gracechurch Street, London,

England.

